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Park County amends Land Use Regulations to allow accessory dwelling units on lots two acres or larger
Summary
Park County commissioners adopted amendments to the Land Use Regulations to permit accessory dwelling units (ADUs) on lots of two acres or larger and to treat ADUs on smaller lots as guest houses, after a public hearing.
After a public hearing and Planning Commission review, Park County commissioners adopted amendments to Article 5 of the county Land Use Regulations to add accessory dwelling units (ADUs) as a permitted use on lots of two acres or greater.
The revisions remove the word "attached" from the ADU definition so the regulation covers both internal and detached units. The board also specified that ADUs on lots smaller than two acres will be considered guest houses under existing regulations, subject to conditional‑use review. In addition, the board directed that ADUs may not be used as short‑term rentals; the amendment references the county’s short‑term rental ordinance for that definition.
Planning staff and county counsel presented background, noting the two‑acre threshold was recommended to address water‑augmentation and well‑capacity considerations on smaller, denser parcels created prior to county minimum‑lot‑size changes in the 1970s and 2010s. The Planning Commission had recommended removing the two‑acre limit; the Board restored the two‑acre threshold and adopted the changes by a 3–0 vote after closing public comment.
Commissioners said the change is part of a broader housing‑policy work stream tied to DOLA grant deliverables and the county’s strategic master plan work.
